Resultados de la búsqueda
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Satellite tracking of black-browed and light-mantled sooty albatrosses from Heard Island and potential interactions with fisheries
Abstract: The purpose of this document is to inform CCAMLR of the results of a satellite tracking ... program on black-browed albatrosses and light-mantled sooty albatrosses at Heard Island (Division 58.4.2 ... ). This was the first time the movements of either species from the island had been studied. Ten black ... foraged on the shelf break within 150 km of Heard Island, and focused 75% of their foraging time in waters ...
Meeting Document : WG-FSA-05/14 : Autor(es): K. Lawton, R. Kirkwood and G. Robertson (Australia)
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An underwater setting method for surface longliners, to minimise the accidental/incidental capture of seabirds
Abstract: The accidental/incidental capture of seabirds by longline gear may be causing a ... significant decline in the numbers of some species (most notably albatross Diomedea sp) in the Southern Oceans ... . In response to the sea bird problem, the New Zealand Department of Conservation funded a programme in ... trials to the setting depth of 1.5 metres. A second trial was undertaken with the backward facing U tube ...
Meeting Document : WG-FSA-97/53 : Autor(es): Walshe, K.A.R., Parnes, P.
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Spatial distribution and population structure of juvenile Antarctic toothfish (Dissostichus mawsoni) in the South Shetland Islands (Subarea 48.1)
between 22 and 78 cm TL, equally distributed between sexes, most of them with gonads at immature stage of ... structure of juvenile D. mawsoni caught during bottom trawl survey on the shelves around the South Shetland ... abundant between 100 and 300 m depth. The sampled population was composed of 150 specimens measuring ... factor. Based on counts of annual growth increments from sagittal otolith sections, age estimates ranged ...
Meeting Document : WG-FSA-18/45 : Autor(es): M. La Mesa, E. Riginella and C.D. Jones
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First Annual Report of the CCAMLR Otolith Network, 2002
Abstract: This report presents results from the first exchange of otoliths under the auspices of ... held at the Centre for Quantitative Fisheries Ecology (CQFE), Old Dominion University, United States ... , from 23 to 27 July 2001. The National Institute of Water and Atmospheric Research, Nelson, New Zealand ... ; Central Ageing Facility, Victoria Australia; and CQFE, each provided a sample of otoliths, processing and ...
Meeting Document : WG-FSA-02/51
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Estimation of the fishery–krill–predator overlap
at nine levels of spatio-temporal resolution and using normal, exponential and uniform foraging ... Abstract: Work undertaken during the intersessional period has enabled better use of the krill ... fishery data, and a comparison between the three existing indices of fishery-krill-predator overlap used ... the level of overlap in recent years (1995-98) than estimated with either the catch in the CPD or the ...
Meeting Document : WG-EMM-99/11 : Autor(es): Secretariat
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A method to evaluate selection of Antarctic krill in towed fishing gears
) apply different trawl designs. Very little information exists on the size selectivity of E. superba ... . Size selectivity describes a given trawls designs ability to catch different sizes of a population and ... is valuable information for the management of harvested marine stocks. Size selectivity data is ... traditionally collected during timely and costly fishing experiments in the field where one design is tested at ...
Meeting Document : WG-EMM-13/34 : Autor(es): L.A. Krag, B. Herrmann (Denmark), S. Iversen, A. Engås, S. Nordrum and B.A. Krafft (Norway)
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Using stationary acoustic platforms to assess precision and accuracy of acoustical krill surveys
issues of krill migrating too close to the surface to be acoustically detected, as well as potential ... issues of diel changes in acoustic scattering strengths. However, due to logistic constraints, acoustic ... effects of krill vertical distribution on survey results. The Institute of Marine Research, Norway has on ... a regular basis deployed stationary platforms in the main area for commercial krill harvesting at ...
Meeting Document : WG-EMM-2019/32 : Autor(es): T. Klevjer, G. Skaret and B.A. Krafft
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A simulation approach to the evaluation of recruitment surveys for D. eleginoides for the Heard Island Plateau region (Division 58.5.2)
Abstract: Assessments of long-term sustainable yield using the Generalised Yield Model (GYM) and ... the setting of total allowable catches (TAC) for Patagonian Toothfish, Dissostichus eleginoides, for ... . Evaluation of both the current RSTS design for Division 58.5.2 and some options for future modifications of ... . Census of fish stocks by age class were compared to population estimates based on simulated RSTS hauls ...
Meeting Document : WG-FSA-04/74 : Autor(es): S.G. Candy, C.R. Davies and A.J. Constable (Australia)
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Demersal fish communities in the Ross Sea region of Antarctica: comparisons between video and trawl survey methods
using the towed camera and at least one of the trawl types, allowing direct comparisons between sampling ... Abstract: Reliable estimates of demersal fish community composition and population densities are ... essential for understanding the ecological effects of fisheries. Such estimates are conventionally derived ... . Using data collected during a survey of demersal fish communities in the Ross Sea region of Antarctica ...
Meeting Document : WG-FSA-12/51 : Autor(es): D.A. Bowden, S.M. Hanchet and P.M. Marriott (New Zealand)
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An initial examination of using CPUE as a fishery performance index for the krill fishery
Abstract: Early analyses of CPUE in the krill fishery concluded that it was not a useful index of ... krill abundance. However, understanding the factors effecting the operation of the krill fishery and the ... extent to which these reflect changes in krill abundance are key elements of developing feedback ... management of the krill fishery. This analysis reviewed catch and effort data from the krill fishery for the ...
Meeting Document : WG-EMM-16/10 : Autor(es): CCAMLR Secretariat